package com.zdmoney.laocaibao.controller;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;

@Slf4j
@Controller
@RequestMapping("/captcha")
public class CaptchaController {

    @Autowired
    private Producer producer;

    @RequestMapping
    public void captcha(HttpServletRequest request,
                        HttpServletResponse response) throws Exception {
        log.info("验证码：{}", request.getSession().getAttribute(Constants.KAPTCHA_SESSION_KEY));
        log.error("验证码：{}", request.getSession().getAttribute(Constants.KAPTCHA_SESSION_KEY));
        String captchaText = producer.createText();
        BufferedImage captchaImage = producer.createImage(captchaText);
        request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, captchaText);
        response.setDateHeader("Expires", 0);
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");
        response.setHeader("Pragma", "no-cache");
        response.setContentType("image/jpeg");
        ServletOutputStream servletOutputStream = response.getOutputStream();
        try {
            ImageIO.write(captchaImage, "jpg", servletOutputStream);
            servletOutputStream.flush();
        } finally {
            servletOutputStream.close();
        }
    }
}